Convenient for drawing lines in calculations! Easy to use on textbooks! Helps prevent children from feeling苦手 (not good at) math with just a little help. Ikariboshi Senbiki-kun Calculation Ruler 10cm Green Brand New, Unopened 1mm thick. Made of recycled PET resin, so it bends well. Easy to bend, making it easy to draw lines on curved surfaces like textbooks. A 10cm mini ruler that is easy for elementary school students to handle. "Quick drawing" of many short lines can be done quickly, neatly, and without hassle. Name sticker included. 《It's not as soft as Daiso's "Soft Ruler." It has more of a responsive flex ⚠️ Subjective opinion》 Shipped via Yu-Yu Mercari Mail (Yu-Packet Post Mini). Please allow up to 3 days for shipping. Not suitable for those in a hurry. Sorry. Please feel free to contact me if you have any questions. ✴️ Please refrain from price negotiations for single items ✴️ ★ Other colors are also available. In addition to this green one, red, blue, and gray are also available. ★ There are multiple pieces of each color. If you would like multiple pieces, please let me know in the comments. They will be bundled and discounted from the single item price. 【It's an additional 239 yen for each additional piece】 (Search terms) Senbikikun Math Ruler Math Set Nishikei TOSS Special Needs Education Materials Brain Training Rehabilitation Occupational Therapy OT Dexterity Convenient Goods Drawing Drafting Addition Subtraction Carrying Over Borrowing Addition Subtraction Calculation Drills Workbooks Calculation Notebook Kumon Teaching Materials Research Lesson Study Teaching Material Development Clumsy Developmental Coordination Disorder DCD Vision Training Stationery